Nagative voltage switch
OwnerTing Huei Cheninventor
Life of this patent
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Abstract
A negative voltage switch includes a switch unit, a voltage level converting circuit, and a discharge circuit. The switch unit has an input terminal for receiving a negative input voltage and an output terminal coupled to a load. The voltage level converting circuit receives a control signal and switches the switch unit to a first state or a second state according to the control signal. The switch circuit is switched to the first state if the level of the control signal is higher than a predetermined level and is switched to the second state if the level of the control signal is lower than the predetermined level, and the predetermined level is higher than the level of the negative input voltage.
Claims20
A negative voltage switch, comprising:
- a switch unit, having an input terminal, an output terminal, and a control terminal, the input terminal receiving a negative input voltage, and the output terminal being coupled to a load;
- a voltage level converting circuit, receiving a control signal and switching the switch unit to a first state or a second state according to the control signal;
- and
- a discharge circuit, coupled to the output terminal of the switch unit and a reference terminal, receiving the control signal, and electrically connecting the load with the reference terminal as the switch unit is turned off;
- wherein, the switch unit is switched to the first state as the level of the control signal is higher than a predetermined level, the switch unit is switched to the second state as the level of the control signal is lower than the predetermined level, and the predetermined level is higher than the level of the negative input voltage.
Dependencies are inferred from the claim text.